The Powershift Rear Thru Axle is a specifically ...
designed Smart Thru Axle that receives a wireless shift signal from the Classified Powershift handlebar shifter, triggering a contactless energy transfer function within the Powershift hub to change gear.
This is the Shimano Ultegra Di2 Internal Junction ...
Box. This box is referred to as the junction box "B" on a Di2 build. The SM-JC41 is for use with internal wiring setups and is the main center of e-tube Di2 ...
This is the Shimano Ultegra Di2 External Junction ...
Box for connecting the two derailleurs, battery, and cockpit controls in a Shimano Di2 electronic shifting system. This junction works with all Di2 with e-tube wired system components as long as firmware ...